Forming-die.



PATENTED 0013.22. 1907.

H. S. ALBRECHT.

FORMING DIE. nruolnox nun JULY 21. 1001.

W Q1 m No. 868,902. PATBNTED OCT. 22. 1907.

H. S. EGHT.

APPL on FILED JU 1007.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

FORMING-DIE.

Specification of Letters Patent.

Patented Oct. 22, 1907.

Application filed July 27, 1907. Serial No. 385,899.

To all whom it may concern:

Be it known that I, HERMAN S. Annnncn'r, a' citizen of the United Statesof America, residing at city of St. Louis, in the State of Missouri,have invented certain new and useful Improvements in Forming-1)ies, ofwhich the following is a full, clear, and exact description, referencebeing had to the accompanying drawings, forming part of thisspecification.

My invention relates to a forming die for use in flaring sheet metalbodies to render them of bell-shape or other flaring shapes.

Figure I is atop'or plan View of my forming die. Fig. II is a verticallongitudinal section taken on line IIII, Fig. I. Fig. III is an endelevation of the female portion of the die. Fig. IV is a vertical crosssection taken on line IV-IV, Fig. I. Fig. V is an elevation of the upperpart of the post and locking key, and a fragment of the upper section ofthe female die. Fig. VI is in part'a vertical longitudinal section takenthrough a modification of the female portion of the die and in part anelevation of the male portion of the die. Fig. VII is a vertical crosssection taken on line VII-VII, Fig. VI. cation with the upper section ofthe female portion of the die partly broken out to afford a view of thelower section of said die. Fig. IX is a vertical longitudinal sectiontaken on line IX-IX, Fig. VIII. Fig. X is an end elevation of the femaleportion of the die illustrated in Figs. VIII and IX.

In the accompanying drawings: 1 designates the bed of my die upon whichis mounted a pair of guides 2 that extend longitudinally of said bed. i

A designates the female portion of the die which comprises a lowersection 3 that is secured to the bed 1 by bolts or other suitable meansand an upper section 4 that is hinged at 5 to the lower section. The'sections of the female die portion are provided with channels 3 and 4adapted to register with each other when said die portion is closed,thereby producing a circular opening that extends through said dieportion. At one end of each of the sections 3 and 4, the channelstherein are continued in an outward direction so that said channelsterminate to produce a flaring or bell-shape face at the end of said dieportion.

6 is a post extending upwardly from the lower section 3 of the femaledie portion and which is permitted to enter into the upper section 4,due to said upper section being notched, as seen in Figs. I, IV, and V.The post 6 is slotted near'its upper end to receive a key 7 that, wheninserted through the post, serves to hold the-upper section 4 to thelower section 3, when the female portion of the die is in a closedcondition.

8 is a handle projecting from the upper section 4 by i Fig. VIII is atop or plan View of another ruodiii-' adapted to operate upon the bed 1between the guides 2 and which is provided with a conical or boll-shapenose [0, adapted to be moved into a position within the female portionof the die. The male member of the die may be moved forwardly andbackwardly relative to the female portion of the die by the applicationof power thereto in any suitable manner.

11 d csignates a resistance block that is mounted upon the bed 1,adjacent to the end of the female portion of the die opposite to thatwhich faces the male member of the die. This resistance block contains apocket 12 and it is provided at the rear of said pocket with a flange 13containing a screw thrcaded bore.

14 is a screw rod mounted in the flange 13 and having fixed to itsforward end, above the rcsi stance block 1], a head 15.

16 is a jam nut on the screw rod that is located at'thc rear of theflange 13.

In the practical use of my forming die, a piece of metal such as a tubc,as seen at X Figs. I to IV inclusive, is introduced into the femaleportion of the die while said die portion is in an open condition, dueto the upper section of said portion having been elevated. The screw rod14 isthen manipulated to a suflicicnt degree to cause the forward end ofthe piece of metal that has been laid in the female die portion to bcprojeiaed to the desired degree beyond the end of the female die portionthat faces the male die member. The jam nut 16 is then set to the rearface of the flange of the resistance block 11 and the screw rod 14 isheld from movement in order that the head 15 on the screw rod may serveas a non-yielding resistance member for the piece of metal that is to beoperated'upon in the die. The male member of the die is then movedrcarwardly toward the female portion of the die and its tapered nose byentering into engagement with a piece of metal to be operated upon,causes the portion of said piece of metal that is engaged by said noseto be spread or flared outwardly into the flared cavitypresent at theends of the sections of the female die portion.

In the modification shown in Figs. VI and VII, 3 and 4 designaterespectively the lower and upper sections of thefemale die portion and 9the male die member. having a tapering nose 10". The sections of thefemale die portion contain channels of similar shape to those previouslydescribed. 17 are bushing plates that are detachably connected to thesections of the female die portion and which are shaped correspondinglyto the channels in said sections. 1 These bushing plates areremovably'attached to the die sections byscrews or other suitable meansand they serve as a medium for decreasing the size of. the openinginwhich the pi see of metal is formed. The bushing plates being detachableplates of varied thickness, may be employed at different time, therebyproviding for the operation of the die in flaring pieces of sheet metalof various sizes.

